Image Intensifier Tube Gen 2+ Level 2 - Resolution 45-57 lp/mm - Field of view cleanness by zone NL2 IIT offered by AGM very limited number of spots in Zone 1. - Magnification 1x (3x optional) - Lens System 19 mm; F/1.26 - FOV 51 - Focus Range 0.25 m to infinity - Eye Relief 17 mm - Diopter Adjustment -6 to +2 dpt - Led Indicators Low battery; IR on; Excessive light conditions - Infrared Illuminator Yes - Manual Gain Control Yes - Bright Light Cut-Off Yes - Automatic Shut-Off System Yes - Battery Type One CR123A (3V) or AA (1.5 V) - Battery Life (Operating) Up to 20 hours at 20C (up to 80 hrs with optional battery pack) - Operating Temperature Range -40C to +50C (-40F to +122F) - Storage Temperature Range -50C to +50C (-58F to +122F) - Weight 615 g (1.35 lbs) - Overall Dimensions 112 118 74 mm (4.4 4.6 2.9 in)